单项选择题

The river was______ with waste from that factory. Some measures must be taken to stop its production.

A．corrupted
B．consumed
C．contaminated
D．infected
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The leader went his own way in ______of the public opinion, which aroused great anger among the people.
A．defiance
B．reflection
C．obedience
D．observation
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Sick ______she was, she has to prepare food for the whole family.
A．although
B．as
C．because
D．for
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